Unstacking machine



Dec 16, 1930'; A. E. BRONSON ET AL 1,735,374

' UNSTACKING MACHINE Filed July 16, 1928 4 Sheets-Sheet 1 Z jg. Z Alfred/M firm/en Attorney Dec. 16, 1930. A. E. BRONSON ET AL 1,735,374

UNSTACKING MACHINE Filed July 16, 1928 4 Sheets-Sheet 2 A/berf 5. 8/0/1500 Inventors. A/freo M Braden By I A llorney Dec. 16, 1930.

A. E. BRONSON ET AL UNSTACKI NG MACHINE Filed July 16, 1928 4 Sheets-Sheet 3 A/berfifirqnsoi; A/ffQO M Braden Dec. 16, 1930. A. E. BRONSON ET AL I 1,735,374

UNSTAGKI NG MACHI NE Filed July 16, 1928 4 Sheets-Sheet 4 8 8 v I illlllllmllllllll 85 A/fif? 3/0/7800 Inventors fl/fred M 3/0 (102 J J5 Attorney receives power. transmitted through belt 21 'from the pulleys-22bit the drive shaft 23, which latter shaftis. provided witha' friction disk 1 24 and journa led in: suitable bearingschainand the ofi-bearing or conveyer cha-in.

' In order that. the generalassembly and arrangement of parts of the invention, and the 7 utility of the various parts may readily be.

- 5 understood we have shown stack or pile 1 a v of boards made up of layers orFcourses that are separated by sticks 2 extending transversely of'the boards.or'lumbengThe stack is formed in suitable manner on a truck or;

vehicle. 3 having wheelst that run on the track rails-5 whichare laid onthe topordeck i it 6 of an elevator 7. =Theelevator, is verticallyreciprocable in a pit-8'through'the'instrumentality of four rack plates, or posts'9lorack wheels 10,- carried by and spaced apart 'on their respective horizontal andparalleh 7 shafts 11 and 12 that extend longitudinally,

of the elevator and its pitQ On the ends of the shafts, exterior of the pit, are provided gear wheels =13kwith;which pinions'14mesh. Thepinions are carried by thelspacedishafts l5 vand -16 exterior of the pit-and each shaft has a'iwor'm" wheel 17 I forengagement with v a worin' l8 on the worm;sh.a-ft"19 that is jour i nal'edzz'transversely ofthe-shafts; 15 and 16- and in 'a lower plane r i i j '1 :For'drivingthese operating parts of the elevatogthe'piilley 20;of the worm shaft 19 Yfri ction diskmaybe revolvedin two direc- I tionsqfor driving 1 the elevator operating 1 mechanism to raise or lower theelevator,and

for this purpose two friction wheels-25, and

engagement.

P' alined shafts27 and 28, andthe wheel .is engaged with-the-diskfforglow speedinlliftas .a line shaft and journaled' in suitahlei'bea'rri may readily betransmittedtherefrom; i

0: shfim j p re bei g'ji di a esf cated,'rnear thecorners of the l elevator," and1, I these 'rack plates e o-act" withtwo'pairsof supported in the frame or'structure F located f atone side of the'pit audits elevator.. The

26 are adapted for alternatelfrictionalYen-1 gagement withthefaceof the disk, one wheel being moved into engagement with the diskwhilethe other is being moved out? of such 7 45 if gi .aThe two friction wheelsare carried by the ingsiiithe-fram'eF,in'po'sitionso-thatipower 9 o V 1 :Thepower shaft, whichccas'shown'extends V rparallelwith the rack shafts oftheielevator,

fisflr rl i e i ec e te z 3i m s. V a'pulleyBfiVandrbeltl35;;-throughthe pulley36 tained between the sprin w ressed deten't and in-Figure -l with the chain shown by dotted lines. v

I For. lowering the elevator athigher speed, the friction drive is actuated from the power shaftv 32 by means of a pulley37, chain 38 shown by dotted lines, and the pulley 39 on To permit the friction wheels 25 and 26 to be moved alternately into and out of engage ment withthe. friction disk in theoperation of the eleva-tor,"the shafts 27 and 28 are'journaled in bearings 40 andlthat are slidable on the. bearing plates 42, Figures 7 and 8.7 As seen in Figure 8 this friction drive mecha nism is under .controlof the manually operated lever 43 in'the b'ank for 1e'vers, as 44. -,Thelever 43 is pivoted at 45 and has pivoted toit's shorter arm a draw link- 46, at the end of which ,jare provided a pair of spaced springs 47 and 48located at opposite sides of thesp'r-inglink49 thatis-pivotd. at 50. A

pair of coupling rods 51 an'd '5 2, adjustable as r to theirlength, are 'pivotedto-thespring link 49at opposite sides of its pivot',iandthese con plingf'rods are pivotally connected to the separate bearing'levers 53- and 5 4. -The bear- 7 ing levers are pivoted "on 7 an commori -pinj 55" [supported-on the slide plate42andeach bear- 7 ing lever-is connected by abearinglink- 56 to a: slide bearing, asAOfa-nd' 41101 the friction' wheels.) {Lhus bymoving the lever 3&3" on its pivotion 'el'ofthefriction wheels'is moved into engagement with the friction disk while'the other wheel :is' simultaneously :moved out of engagementwiththe disk, fonrever'sing the movement of the elevator, with gbothfriction wheels out of engagement of course power is not transmitted froin the wheels to ithe'diskl The'springs 47 and 48 provide resiliencyiin the-applicationof they manual power'to the spring link, coupling rods,'and bearing levers; asrthe friction wheels are shifted, to prevent toosudden frictional engagement between at wheelland the disk, 'and'to absorbgandfoushion f excessive strains in the eontrol mechanismr f In Figures? and 18jitzwillbe'seen thatthe lever" 43 maybe ;retained atj'eithe'rvof the op posite endsiof-thelever-baclr4 45 111adjusted position by: the use of springspressed, 'fric 7 tional -detents;57 and :58 that are affixed at} theendsofaplate59,-withinthe bank; These: detents 'have' 'beveledfadjoining:endsnfor the 3 lever tor'slip' over and-the detents and plate are supported within the'ibank; means of bolts. 60 *about' which are coiled springs- 61,

The springs tend-to draw the plateandits-de tents toward the front wall ofithe'bankand as the lever. is moved to right or 1eft in 'Figure' 10 it, will beifrictionally engaged and reg the ontwallof the ban safety orfsftopimechanismsthatis'auto;

matically-actuated, is. provided; to prevent:

excessive jlupwardimovement and, excessive wnw d r' rement'pfjtheielevatpr andz as;

bestseen in Figure 8 asafety link is: pivotall connected t thespring lever e9, connected t9 a re ck arm 63 cm the rock-shaft The rdck'shaft is' jouriialedfin bearings Within the pit at 68, with its "freeend the;

' elevator is indicated at its uppermost posi U tion, or closelyapproaching that positionyso i the'high speed wheel with the disk tolovver the elevator or the movementof the elevator path of'movement of an iuppe'r stop arni 69; and alevver stoparm/70' affixed to asuitab'le portion of the elevator. In Figure Stlie that if the upward movement is continued, the stop arm 7(lwill sW-ingthe tappet arm spring lever 49- Will be swung on its pivot 50,

to withdraw the frictionjvvheel of the low speed drive from the friction .disk and engage may be stopped as bothfriction WlIGGl S'ZLi' Q its pivot. The drum shaftahd drums farej.

revolved byjmeansof the manuallyioperated p Jwin'di'nggear 77, Figurell and the'uustack- "v i e' ing devices are permitted tohave range or 1 th movement between (the-horizontal position 'of f Q full lines and theiraised ang ition' in V dotted lines of Figurel 11L;- ;When inoperative fpO'SitiQIIthe ns devices are disposedjinythefullline position. of Figure fill; extending transversely across a the .pit above the stack ofrlumber on the truck,- inorder that the unstacking-chains 78 carried by the beams iuay transfer the upper layer 0r course ofluinber frourthe stack, to-the' left in Figuresl and 11. p 7 i The endless chains 78 are supported onsprocket wheels 7 9 and 80,-th'e former on the-.- 'unstacking 'shaft 72 andthe latter journaled .60

thrown out ofengagement With the disk]:

v The unstacking devices; shown as three in nuriiber in Figurel' includethree-bearns 71 Whichfare pivotedqon -the unstaeking shaft 7 2 that is journaled in 'the'frani'e and ex= tends parallel I with the elevator operating shafts 11 and 12. in; the;pit, but these unstajcking beams are pivoted in a. superstructure of pi the frameandoffset from the 'pit, inorder i that the beams may be swung ontheirfpivotS to operative or inoperative position, transf versely of the pit andcf the stack of lumber or boards on the truclri meansof ai-hoistk ing cable 73, guide pulleyjl: journaled in brackets on the superstructure ,of the frame 7 F, and drums 75 onTtheidrum shaft 6, the

free ends of the unstackingdevices Inaybe' raised or lowered as the beam issivungon in adjustable bearings Slat the free end'sof the adjustmentQ Two tappets83 are shown. ontheunstacking chains; and the tappet on" the lowe'r fiight 0f the endless'ichai n; as it passes to. theleft in Figure 11', engages an end the lever armf-has a truck;

the. manipu o 9 their; funetio tacking;

dge oflw i se rilayr Q b'Q uie. s ow in Figure 2 where. a course "is being transferred orflfshi fted la rallylofthe stack and 5 e j l ssci a f terminate-dragEde Vices areed heiri pro k et 'Ofieh the froimthe sp rocket nstacking" shaft. 72

a i friction drive {Wheel or pinion ,89. "on the shafted andwhe friction shaft is driven y froma 1 pu ler dotted i el 92,- idmud I 67, andthrough the describedlinkage, the; i

as indicated inlFigureli' I f,

power shaft 32 byjm a fofillh I80 antasie -c ntro d fiet 'b fi 39 881is indicatledgwher slide" journaltearing 94" forum shaft 87 isaadjustable 0 I 'handleve'r V the guide p tefifiana p theunstackingid 7 e rd: rn away f o .e fe a iu mentiher it 'f 01 11, jji

. IngFi fife 12itj 1 eed chains;1O1,are located;111aplafiebe V t'Wi-l Lb e l atfthefeed-ch wsmayb diilsfied belovv 11he -{uil State} i )g s-l-illi libsition so i j j that the toplayer 50f .boardsvvillbe shifted; by

linstackingfchainfs 78, "ai'1d-in'Figur of he V ll n t iri i m n yahd p the'operator will ireadilybecoine proficient in I f;tl ie lever forcontrolling es in the perfor nanc'etof :levere m il hapiatezesg a 95 i"* namesake a e op a ey lir'x e 9 I :2; from the stack; to a ser es of feed cha ns 01 comazo] 3 .a f b ai r e tal p an g-t p. feed-chains The ,housings anaemi 3 V f fee'dgrcha'ins are :shiftedoradjustedthrough 1. .i Q mtIiipulati0nofa hand lever 106 in the bank] ip t d v n'e m liifilri ot ly e ipe' ppe tfre i 

